I know this is a common experience on many sites but I'm a paying customer on flickr.com (have been since ~2004) and other day I visited in a new browser or in private mode and got the "we use cookies..." dialog, it list over 90 advertising companies and probably over 500 tracking options.

Want to see it, go to flickr.com in a private window, it should pop up something about cookies. Pick "Manage Settings". It's insane.